#container
{
width: 50%;
margin: auto;
width:1200px;
margin:0px auto; /* Right and left margin widths set to "auto" */
text-align:left; /* Counteract to IE5/Win Hack */
padding:15px;
}

#rightnav
{
float: right;
width: 0px;
margin: 0;
padding: 0px;
}

#content
{
margin-left: 150px;
border-left: 1px solid #cccccc;
border-right: 1px solid #cccccc;
margin-right: 0px;
padding: 5px;
width: 500px;
}